Year	Percent
2005-01-01	4.81740210600300
2006-01-01	4.59072844661627
2007-01-01	4.01042086839327
2008-01-01	3.50163109084134
2009-01-01	3.37749451435913
2010-01-01	3.03872816131808
2011-01-01	2.62435353370736
2012-01-01	2.43852761984357
2013-01-01	2.34269122344017